1 species
1 subspecies and varieties
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Scleranthus annuusannual knawel
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Saskatchewan, Montana, and Idaho; also from the central U.S. to eastern North America.
Habitat: Disturbed soils, waste lots, and cultivated areas.
Origin: Introduced from Europe
Flowers: April-July
Growth Duration: Annual
ssp. annuus – annual knawel